IceCTF 2016 - Vape Nation

Challenge description:

Go Green!

They provide a png called vape_nation.png:

With the hint I figured it must be a green filter of some sort so I loaded up Stegsolve and checked out the green plane filters. Green plane 0 resulted in the following:

Looks like a flag :)

IceCTF{420_CuR35_c4NCEr}